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http://dx.doi.org/10.11626/KJEB.2016.34.2.063

Life Form and Naturalization Characteristics of Naturalized Plants in Upland Fields of South Korea  

Kim, Myung-Hyun (National Institute of Agricultural Sciences, RDA)
Cho, Kwang-Jin (National Institute of Ecology)
Oh, Young-Ju (Institute for Future Environmental Ecology Co., Ltd.)
Yang, Dongwoo (Department of Biological Science, Ajou University)
Lee, Wook-Jae (Institute for Future Environmental Ecology Co., Ltd.)
Park, Sangkyu (Department of Biological Science, Ajou University)
Choi, Soon-Kun (National Institute of Agricultural Sciences, RDA)
Eo, Jinu (National Institute of Agricultural Sciences, RDA)
Kim, Min-Kyeong (National Institute of Agricultural Sciences, RDA)
Na, Young-Eun (National Institute of Agricultural Sciences, RDA)
Publication Information
Korean Journal of Environmental Biology / v.34, no.2, 2016 , pp. 63-72 More about this Journal
Abstract
The objective of this study was to identify the life form characteristics, naturalized degree and introduction period of naturalized plants on upland fields in South Korea. The survey sites were selected in 222 upland fields over 9 provinces where are relatively dry soil conditions and are disturbed continuously by farming practices. It seemed that these uplands maintain good condition for the invasion and settlement of alien plants. Field surveys were carried out twice from May to June and from August to September in 2013. The vascular plants of the upland fields were listed into 539 taxa which contain 103 families, 320 genera, 448 species, 2 subspecies, 74 varieties and 15 forms. Ninety nine taxa were naturalized plants composed of 23 families, 64 genera, 91 species and 8 varieties. The urbanization index and naturalized index is 30.65% and 18.37%, respectively. Among total 99 naturalized plants, Compositae (30 taxa) was the most dominant family, and followed by Gramineae (14 taxa). On the basis of dormancy form, 78 taxa were belong to Th (Therophyte). In radicoid form, $R_5$ plants (86 taxa) and $R_3$ plants (14 taxa) were dominantly distributed. In disseminule form, $D_4$ including 63 taxa and $D_2$ containing 26 taxa were dominant. On the basis of growth form, erect form (e) containing 26 taxa was dominant. In conclusion, life form spectrum was $Th-R_5-D_4-e$ type. According to life form analysis, naturalized degree and introduction period, alien plants with unique characteristics may have high ability to settle and spread nationwide after inflow into South Korea. It needs further to observe some plant species with or without ecological features such as widely disseminated seeds by wind or water, high seed productivity, long life-span seeds, high germination rate of seeds, or non-dormant germinable seed.
Keywords
upland field; Flora; Life form; Naturalized plant;
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Times Cited By KSCI : 16  (Citation Analysis)
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